LED explosion-proof street lights with high color temperature have high light efficiency and good energy-saving effect, but they are uncomfortable, prone to visual fatigue, and have poor fog transmission; Although low color temperature feels comfortable, the light efficiency is low and the energy-saving effect is slightly worse; So, in practical applications, what kind of color temperature can balance the needs of light efficiency, energy saving, and comfort, and achieve high cost-effectiveness.
What color temperature is used for explosion-proof on main roads and branch roads?
Low color temperature street lights make people feel natural and familiar, but their wattage and lumens are not as good as those with high color temperature. High color temperature can improve pedestrian concentration, but it can also cause visual fatigue for drivers. Therefore, the lighting effect needs to be measured by multiple indicators comprehensively. So we suggest using street lights with a temperature range of 3500K-4000K for the main road and 2700K-3000K for the branch roads. But in terms of color temperature, it is impossible to meet multiple needs. If you have to choose a color temperature that takes into account multiple aspects, I personally think 3000K is more reasonable. ”
According to the consensus of technical personnel from multiple companies, LED light sources with a color temperature greater than 3500K have little difference in light efficiency, while light sources with a color temperature below 3000K will reduce light efficiency by about 10%. 4000K is suitable and can meet various needs, with high energy-saving and cost-effective performance. It is recommended that the color temperature of LED street lights should not exceed 4000K!
From the current technology of LED chips, the difference in light efficiency between high and low color temperature LED chips is approaching. A color temperature of 3000K~4000K can basically meet various needs, achieve high cost-effectiveness, and also make people visually comfortable.
If it comes to the comfort zone of color temperature and illuminance, different illuminance requires different color temperatures. For example, it is recommended to use around 3000K for street lamps, around 3000K to 4000K for tunnel lamps, and around 4000K to 5000K for indoor lighting, which is generally more comfortable; However, considering the overall cost factor, the efficiency is relatively low within 3000K. Currently, it is recommended to use a color temperature of around 4000K for street lights.
In theory, the average color temperature of the sun is about 5600K. Beyond this temperature range, it gives a more pronounced cool tone. Although the color temperature of noon sunlight is close to its natural color of around 5600K, humans generally choose to take a nap under these conditions, and work efficiency is at a low point. Therefore, a color temperature of around 5700K is not ideal; The sunlight at around 7 or 8 o'clock in the morning is about 4000K, and the color temperature of the sunlight around 2 or 3 o'clock in the afternoon is around 5000K. During this period, human activities are active, and choosing 4000K or 5000K is in line with human activity patterns.
Summary:
At 5000K, the ratio of yellow light to blue light is appropriate, resulting in high light efficiency; When the color temperature is 3000K or lower, the light efficiency decreases, the stress response time of people increases, and their alertness decreases. Therefore, this is a misconception that only satisfies the preferences of some people. 5000K is the appropriate color temperature for street lights. If you consider your usage habits, you can also accept a color temperature of 4000K. If you have to choose a color temperature that takes into account multiple aspects, I personally think 3000K is more reasonable.